To me, the most important factor is SIZE. If small size is important, then any EP/L/M-x. If you want a scaled down APS-C DSLR, then EM-x, any of them. I have APS-C Nikon and many lenses but I built an m43 system around EPL body for easier travel and grab shooting. Ten years ago, no-one had any of today's now-indispensable features.

True, but the E-M10 and E-M5 are still darn small cameras, a lot smaller than a DSLR. I tried the E-PL5 and, while loving its output, just couldn't get on with its cramped layout and lack of manual controls - not helped by the fact I have big hands. Now the GH3, that in my mind IS big for m 4/3 and almost too close to DSLR size, but no the E-M range or the Pannie G range (G6 is very nice).

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"When words become unclear, I shall focus with photographs. When images become inadequate, I shall be content with silence." Ansell Adams.